Combined lock-sleeve and dust-cap



W. M. ANDERSON COMBINED LOCK SLEEVE AND DUST CAP.

APPLICATION FlLED FEB. 11, 1920. 1,370,395. v Patented Mar. 1,1921

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UNITED STATES i it fiOllIBINED ILQCK-SLEEVE A'El'D DUST-CAP.

Specification. of Letters Patent.

Applieation filed February 11, 1920. Serial Ho. 353.00%.

To all whom a may concern:

Be it known that I, WILLIAM M. ANDER- soN, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in CoinbinedLock-Sleeves and Dust-Caps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its obj cot to provide a simple and highly efiicient combined lock.- sleeve and dust-cap, which may be very quickly and easily applied to or removed from the valve stems of pneumatic tires and the like, and is intended to take the place of the independent lock-nut and dust-cap now commonly used.

To the above end, the invention consists of the no 'el devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a view partly in elevation and partly in transverse radial section, illustrating the invention applied to the valve stem of a pneumatic tire mounted on a demountable rim of an automobile wheel;

Iig. 2 is a fragmentary detail view illuscrating the lock-sleeve as the same is applied or removed from the valve stem;

Fig. 3 is a sectional view of the lock-sleeve and dust-cap as the same appear applied to the valve stem, as in Fig. 1;

Fig. 4 is a perspective v ew of the several members of the loclcsleeve and dust-cap separated and with some parts broken away and sectioned; and

Fig. 5 is a view partly in elevation and partly in transverse section taken on the line 5-5 of Fig. 1.

The invention is shown as applied to an externally screw-threaded valve stem (3 attached to the inner tube 7 of a pneumatic tire, the casing of which is indicated by the numeral 8. The pneumatic tire is mounted on a demountaole rim 9 applied to the tellyband 10 of the folly ll of an automobile wheel. Alined radial openings 12, for the valve stem 6, are formed in the rim 9, tellyband 10 and telly 1.1. Applied to the valve stem (3, within the openings 12, is a sleeve 13 provided for taking up lateral. play of the valve stem and also to protect the same. Applied to the inner projecting end portion of the valve stem 6, is llhe llllDlf-fl combined loclcsleeve and dust-cap, which comprises a lock-sleeve 14-, a collar 15, and a dust-cap 16 adapted to he removahly applied to said lock-sleeve. Formed on one end of the lock-sleeve 14 is a head 17 having I ernal annular flange 18. inward of which a conical external surface 19. Within the head 17 are formed t screv-nthreah 20, which, as best shown in Fig. are eve size in respect to the screw-tine on valve stem 6. These screw'threads 20, how ever, preferably have slight interlocking engagement with the screw-threads on valve stem 6, so that when tl loclcsleei is applied to said valve stem or remove therefrom by an axial movement of the lo sleeve, the threads there i ride over screw-threads on the valve stem 5 with a spring action produced in. the lock-sleeve 14., as will presently appear. p G11 the opposite end of the loch-sleeve Irom the head 1'1, is an. external annular lock-bead 21, adapted to enter an annular internal lock-groove 22 in the dust-cap 16 when said dust-cap is applied to said lo sleeve to assist in holding the same The cooperating lock-bead 21. groove 22 are not absolutely ueces ai" the reason that the said dust-cap Eric ally held on the lock-sleeve M with ing action, will presently appear, and be dispensed with it so desired. Cut in ends of the lock-sleeve 14 are longitudinal v extended, circumferentially spaced slits and 24, and it is important to note that the inner end portions of said slits overlap. as best shown in Fig. i. A

The collar 14 is removably applied to the head 17 on the lock-sleeve 1a, and is prcvided with an internal co... al surface 2."; arranged. for coiiperation with the conical cur-- face 19 on the head '17, to contract said head when the sleeve 1% is moved axially into the it collar 1:; and thereby locks said sleeve to the valve stem 6 by pressing its 20 into the scrcvethreads on the v An internal annular shoulder collar 15., cooperates with the loo on the head. 11.7 to lock said. collar on sleeve 14. with freedom for eetnple movement in or remove the fl, it isonljv neceson the said lock sec in upplvl.

stein 5,1;hc c

tnc lolly 11, the lock isleevc 14: coward lzlic dolls-r '15- -r' d thereby conon of coni' i as she screw M. threads on the .ilc the lock-sleeve 1 1 is' o is. 155, which is externally e misled toward the right cent between the will cause the loci:- la haze collur15, and the lam cl; the some. col surfaces 1 threads 20 valve s thus he knurled, may and frictio conical surfaces 19 and sleeve 1 .le

lac-roe mesds 20,

screw waning in the screvvthreads on Live valve sic h 6., will'impart an movement to the looir'sleeve 14 and col 15 and thereby force lzhe collar against the its 11 with pressure which will socurely lock the slee e 14 to the sleeve stem 6. The dL cap 16 may 'ihenlce tclescoped looloslccve liprciercbly with a, r vning movement; to cause the some noise until she loclrhecd 21 micro inc loch-groove 2%, or in case said head w nd are 'speused with, until the dusbcao 1 6 31 the collar 15. The, external d lock-sleeve 1Q: is sl 'htly ov,,,-siz* i3 cs-3t to the internal 3 cap 16, so that diameter of the when the rlust-csp 15 is telescoped onto "the loch-sleeve, sci lock-sleeve will be slightly controcleo to friolionully hold said dust-cop This contracting of lock-sleeve A l, by she application of the dustcep 16 thereto, will also place the head 17, of lhe lock-sleeve 14, under strain to contract, and in case the collar 15 should Work loose, the screvv--l;hrends 20 will still he held securely interlocked with the crevwthrsads on thsvnlvc stern 6 by the action of the dust-cup.

lions thereof tolls flange 18 to In case the dust-ca 16 should be lost and the collar 15 become loose centrifugal force will tend to hold the lock-sleeve 14 and collar 15 on the valve stem 6, whilethe wheel to which the invention is a plied, is in rotation, and in case the Wheel SIOIlld stop with the valve stem at the top thereof, the slight enga ement of the screw-threads 20, on the vs vs stem 6, will still hold said lock-sleeve sarmze from expanding.

To remove the combined lock-sleeye and dust-cap 16 from the valve stem, it is only necessary to pull said dust-cap axially from the lock-sleeve 14 and then, by a slight turning movement of the collar 15 to the left, the lock-sleeve 14: isturned therewith to release the frictional engagement of the conical surfaces 19 and 25 and permit the head 1'? to expand and thereby release the screw-threads 20 from the screw-threads on the valve stem 6 sufllciently to permit the" lock-sleeve and collar to be withdrawn from the valve stem by a straight axial movement.

What I claim is:

1. A combined lock-sleeve and dust-cap for valve stems, including a. sleeve having in one end a head with internal screwthrcads, said sleeve being longitudinally slit at both ends, a collar applied to the head on the sleeve and operative to contract the some, and a dust-cap applied to the other end of the sleeve 1'00 contract the same.

2, A combined-lock-sleeve and dust-cap for valve stems, including a sleeve having at 'one end ,1 head with internal screw-threads, said sleeve beinglongitudinally slit at both ends, with the, inner end 'ortions of said slit extending past, each of; or, a, collar ap-' plied to the head of the sleeve and operative to contract the same, and a removable dustcap applied to the other end of the sleeve and o 'erative to contract both ends thereof.

sleeve and operative to, contract the some,

and a removable dustcap applied to the other end of the lock-sleeve and operative to contract both ends thereof.

4. A combined lock-sleeve and dust-cap' for valve stems, including a sleeve having at one end a head with internal screwcombined l) (li'-SlB9V8 and dust-cap- 'for valve stems, lnciudm-g a sleeve having threads, said sleeve having at each end a plurality of circumferentially spaced longiizndinally extended slits, the inner end porticns of which are extended past each other, a collar applied to the head of the sleeve and operative to contract the same, and a removable dust-cap applied to the other end of the lock-sleeve and operative to contract both ends thereof, said collar and head having conical surfaces to frictionally connect the one with the other.

5. A combined lock-sleeve and dust-cap for valve stems, including a sleeve having at one end a head with internal screwthreads, said sleeve having at each end a plurality of circumferentially spaced longitudinally extended slits, the inner end poring conical surfaces to frictionally connect the one with the other, said collar and sleeve being connected for independent rotary movement and with freedom for a limited axial movement in respect to each other.

In testimony whereof I affix my signature in presence of two witnesses. WILLIAM M. ANDERSON.

Witnesses:

EVA E. 'Komo, HARRY D. KILGORE. 

